On the bench today there is a PS3 "phat" which was a tad abused by the previous owner.
I purchased it to practice with SMD rework but I soon got "attached" to it and really wanted to fix it!

This is the "CECHCxx" series, the one with PS2 compatibility.

Will I succeed?

00:18 Introduction
01:58 First problem
05:38 Testing the Power Supply
08:21 New Power Supply!
09:05 TESTING!
09:34 1st troubleshooting
11:54 SYSCON fun!
16:26 Accessing Syscon
17:36 Syscon Error codes
20:46 2nd troubleshooting
25:51 Syscon Internal Mode
26:52 3rd Troubleshooting
32:02 DeLid the CPU!
37:20 Goodbye!

For an excellent Syscon tutorial, please see here:
   • PS3 Syscon connection guide  YLOD Di...  

Timbo got his hands on a PS3 with an identical issue and succeeded in reviving it. See his video here:    • Console turns off after fan ramps up ...  

You will find all the instructions and also a package containing all the files you may need for the task!